The City of Everett's 1st sewers were constructed in 1890, 3 years before Everett was incorporated. In 1897, the construction of a citywide system began in north Everett. This north portion of the system is combined, carrying stormwater and sanitary sewage to Everett's wastewater treatment plant, called the Everett Water Pollution Control Facility (EWPCF). With population growth, the system expanded to the south. The south portion of the system is sanitary sewage only.
Comprehensive sewer plan
- 2014 Sewer comp plan volume 1 - sewer plan (PDF)
- 2014 Sewer comp plan volume 2 - appendices (PDF)
- 2014 Sewer comp plan volume 3 - basin plans (PDF)
Utilities annual financial reports
Everett's wastewater system serves about 165,000 people, conveying sewage through approximately 345 miles of sewer mains, interceptors, laterals, and 31 lift stations to the Everett Water Pollution Control Facility (EWPCF).
In addition to the community of Everett, the EWPCF also treats a portion of the sewage from 3 neighboring sewer systems: Mukilteo Water and Wastewater District, Alderwood Water and Wastewater District, and Silver Lake Water and Sewer District. This system plays a vital role in protecting public health. It also protects rivers, lakes, and streams from pollutants and minimizes harmful impacts to the natural environment.
View or download our booklet, Wastewater Treatment (PDF) and our brochure, How is wastewater treated (PDF) to learn about our wastewater treatment system. These describe our system's preliminary treatment, primary treatment, 2 types of secondary treatment—a pond/lagoon system and a mechanical system, disinfection and where the treated water is discharged.
Our secondary treatment's mechanical system—trickling filters/solids contact (TF/SC) has a total hydraulic treatment capacity of 40.3 MGD, and discharges to a marine deep-water outfall in Port Gardner Bay that is shared with the City of Marysville. The pond system discharges to the Snohomish River.
Learn more about How we clean wastewater at our treatment plant (PDF)
For information about third-party insurance related to utility infrastructure on private property, contact the Washington Office of Insurance Commissioner at 1-800-562-6900.
Please note: The City of Everett is responsible for and maintains sewer lines in the city public right of way. Within the Everett city limits, per city ordinance 14.08.260, private property owners are responsible for the integrity and maintenance of side sewers outside of the city right of way and any materials they discharge into the sewer up to the sewer main.
Contact Operations at the Water Pollution Control Facility by calling 425-257-8220 to schedule a tour and/or receive additional tour information.
View answers to FAQs about biosolids.
View or download the Everett biosolids program strategic planning documents:
- Basis of planning technical memorandum, November 2010 (PDF)
- Everett Biosolids 101 workshop (PDF)
- Strategic biosolids management program plan (PDF)
Contact Hanna Lintukorpi, Biosolids Manager, 425-257-8946 or email if you have additional questions about biosolids.
Contact Chris Merwede, Lab Supervisor, 425-257-8230 or email, from 7:30 a.m. to 4 p.m., Monday through Friday if you have additional questions about Everett's environmental lab.